Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e6a5c285d05fac4…

MALICIOUS

PDF

70.6 KB Created: 2021-06-13 17:49:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3e8afa622b788a1f9a878267f26bc4c7 SHA-1: e71b868c70b20f3e05f4fe0dfddb0339e36dffe9 SHA-256: 2e6a5c285d05fac438896e90234bca2d5289e3c6c75e9458ad06baf052e1f091
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains a link farm with numerous external URLs, including one pointing to 'drafthe.ru', suggesting a lure to a potentially malicious website. The PDF structure and embedded content are indicative of a phishing or downloader campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://drafthe.ru/pbw?utm_term=pdf+converter+and+merger+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426424/normal_5fd7d255715f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450507/normal_5fd860010a886.pdfIn PDF document text
    • https://basitonivi.weebly.com/uploads/1/3/4/5/134584834/zadinikuso-voseledawodagir-zenujezotobajuv-zutonesanal.pdfIn PDF document text
    • https://fanuterose.weebly.com/uploads/1/3/3/9/133999321/e7664b659.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4403804/normal_60b04c0817bd8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bf18450-827c-4a48-a475-dcdb63f7deb2/pulefamegi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36db6ea8-5669-4fce-884d-505974f634d2/xijedivezuta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47696b09-6352-4126-a894-0c83cf527a9e/45608597603.pdfIn PDF document text
    • http://fiwonotexo.pbworks.com/f/bbg_week_4_day_2.pdfIn PDF document text
    • http://funasazixi.pbworks.com/f/frank_edward_miracle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffa6fafc-5084-47d3-86bf-7d426e3b0b9b/ian_hubert_blender_instagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2556c9b5-78fe-4efa-95f1-531e0fa4b8a3/gifotoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9006168-1a28-4c99-8ed3-f3bda839ce38/retumibo.pdfIn PDF document text
    • http://gupiguna.pbworks.com/f/22676710873.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8076a645-6ab8-4070-bc16-f44e1f2a5039/course_notes_ap_biology_chapter_6.pdfIn PDF document text
    • http://juzifezazuk.pbworks.com/w/file/fetch/145185891/fezevapapezadopetag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ef08aae-c3b6-455a-b264-4f680220f12b/mokabexojufopovotixu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f1351a3-0ea1-41b1-bca7-f0294f59dafc/bisarapotileno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02553767-a35b-4f19-9138-df7de1de0df0/bissell_1977f_symphony_pet_vacuum_steam_mop_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0877a9fe-4c2a-4e59-bb6a-3567bfdad08c/rigiluresosuvibatugunen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b42e9f0-b963-4070-9a8f-75f753f25f4f/will_market_open_on_monday.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b78e268-e7ff-4ff3-9807-7de076926728/kenmore_600_series_dryer_belt.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d63f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD63F 5316 bytes
SHA-256: d11adf123a65c535050f949762b021c4e147aa233fd18c4bab730cdab979f193
font_01_sfnt_off0000e857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE857 10200 bytes
SHA-256: d59c3128464fb1980e64a87c02b365ee3bb572b23299faacf59fa8e3b236b4ef